Facile synthesis of NiCo₂O₄ nanosphere-carbon nanotubes hybrid as an efficient bifunctional electrocatalyst for rechargeable Zn–air batteries

Download
  1. Get@NRC: Facile synthesis of NiCo₂O₄ nanosphere-carbon nanotubes hybrid as an efficient bifunctional electrocatalyst for rechargeable Zn–air batteries (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.ijhydene.2015.12.022
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleInternational Journal of Hydrogen Energy
ISSN0360-3199
Volume41
Issue21
Pages92119218
SubjectNiCo₂O₄ nanosphere; Hydrothermal process; Bifunctional catalysts; Rechargeable zinc–air battery
AbstractDeveloping low-cost non-precious metal catalysts for high-performance oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is highly desirable. In this work, both the primary and rechargeable Zn–air batteries with NiCo₂O₄ nanosphere and carbon nanotubes hybrid (NiCo₂O₄-CNTs) as cathode catalyst are reported. The catalysts are synthesized through a facile one-pot precipitation reaction and hydrothermal process, which exhibited highly active bi-functional catalytic activity for both ORR and OER. Using NiCo₂O₄-CNTs hybrid as a cathode catalyst, the resulting practical primary and electrochemically rechargeable Zn–air batteries give a promising discharge peak power density as high as 320 mW cm₋₂, and a high current density 210 mA cm⁻² at 1.0 V. Also, the rechargeable Zn–air batteries in a two-electrode configuration exhibits an unprecedented small charge–discharge voltage polarization of ∼0.75 V at 10 mA cm⁻², high reversibility and stability over long charge and discharge cycles. The high performance is believed to be induced by the hybrid effect (coupling effect) among NiCo₂O₄ nanosphere and CNTs, which can produce a synergy enhancement for both catalytic ORR and OER.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
IdentifierS0360319915027597
NPARC number23000320
Export citationExport as RIS
Report a correctionReport a correction
Record identifierde7c03bf-a895-49f0-8540-60adfdd026d1
Record created2016-07-07
Record modified2016-07-07
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: